Long draft spinning apparatus



April 21, 1936.

J. L. TRUSLOW LONG DRAFT SPINNING APPARATUS Filed'uardh 4, 1955 INVENTOR.

ATTORNEYJ Patented Apr. 21, 1936 UNITED STATES PATENT OFFICE LONG DRAFT SPINNING APPARATUS Application March 4, 1935, Serial No. 9,127

5 Claims.

This invention relates to apparatus by which yarn may be produced under the so-called long draft system of spinning. In a common form of such apparatus, three sets of driving rolls are provided, and each upper intermediate roll is gear-driven from the lower intermediate roll, said upper and lower intermediate rolls respectively actuating the upper and lower long draft aprons. Driving gears for the upper intermediate rolls are provided at close intervals throughout the length of the machine and good engineering, as well as local safety ordinances, require that these numerous driving gears be provided with effective gear covers or guards. It is also necessary to apply duly proportioned downward pressures to the separate front, back and intermediate top rolls.

It is the general object of my invention to provide a gear cover orguard for the intermediate driving gears in spinning apparatus of the type described, and it is a further object of my invention to combine such a gear cover or guard with effective means for weighting associated back and intermediate top rolls.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawing, in which Fig. 1 is a sectional end elevation of portions of a spinning apparatus embodying my improvements;

Fig. 2 is a side elevation of the front and back casing members;

Fig. 3 is a front view, looking in the direction of the arrow 3 in Fig. 2;

Fig. 4 is a plan view of the main or bearing member and. associated weight arm;

Fig. 5 is a side elevation, looking in the direction of the arrow 5 in Fig. 4, and

Fig. 6 is a front view of the gear cover, looking in the direction of the arrow 6 in Fig. 1.

Referring to the drawing, I have shown a portion of a spinning apparatus operating on the so-called long draft system and comprising a lower front roll 10, a lower intermediate roll II, and a'lower back roll I2, all of said rolls extending throughout the length of the machine and each being driven at a definite predetermined speed.

These lower rolls are supported at frequent intervals in bearings l3, l4 and I5, and the bearings l4 and I5 may be adjusted laterally to vary the spacing between the rolls. All of the bearings are fixed in position during the normal operation of the machine.

Front top rolls 20, intermediate top rolls 2| and back top rolls 22 are similarly provided.

These rolls are not continuous but are formed in 5 short sections, and commonly one of each of these rolls is provided for each two spindles. Usually the lower or driving rolls are formed of steel with fluted yarn-engaging surfaces, and the upper rolls are commonly coated with leather or some other more or less yielding material.

In the long draft system as herein disclosed, the intermediate rolls I I and 2| are provided with aprons 24 and 25 running around the rolls and also around guide pins 26 and 21, so that the portions of the aprons engaging the yarn have an extended path of parallel travel in close contact with each other to deliver the yarn to the front rolls I0 and 20.

A gear 28 is provided on the lower intermediate roll I l for each separate upper roll 2!, and each upper roll is provided with a gear 29 meshing with the associated gear 28 on the lower roll. The upper and lower intermediate rolls are thus both positively driven at the same surface speed. All of the parts thus far described are or may be of the usual commercial type.

My improved gear cover or guard comprises a main or bearing member 30 and a pair of depending casing members 3| and 32. The main or bearing member is recessed at 33 to clear the upper gear 29, and is provided with spaced bearing surfaces 34 positioned at the sides of the recess 33 and adapted to engage and to be supportgtli by the shaft of the upper intermediate top roll Ears 35 project upward from the main or bearing member 30, and the casing members 3| and 32 are pivoted to the ears 35 by a cross-pin 36 (Fig. 6) An oil recess 31 (Fig. 5) and an oil hole 38 (Fig. 4) are preferably provided between the ears 35.

A weight arm 40 projects rearward from the main or bearing member 30 and is provided with a bearing surface 4! adapted to rest on the shaft of the back top roll 22. An oil recess 42 and an oil hole 43 are provided over the back top roll shaft, and this recess and oil hole may be packed with a suitable wick or piece of felt if desired.

The weight arm 40 is also provided with a notch 44 adapted to receive and position a link 45 (Fig. 1) from which is suspended a weight 46. The single weight 46 thus simultaneously applies downward pressure to the intermediate top roll 2| and to the back top r 1 2. a por i of the gear cover or guard being utilized to transmit the pressure to the intermediate top roll.

The casing members 3| and 32 are each preferably formed from a single piece of sheet metal, bent or stamped to the shape shown in Figs. 2 and 3. In their lower portions the casing membersare narrowed to provide recesses ll of merely sufiicient width to clear the driving gear 28. The inner edges of the members SI and 32 are also recessed as indicated at II to clear the shaft of the top roll 2| and as indicated at I! to clear the shaft of the lower intermediate roll ll.

As the casing members are pivoted to the main or hearing member by the pin 30, they may be readily moved apart to permit assembling of the casing or guard with the rolls. After being placed in position, they may be pressed together to the position indicated in Fig. 1, in which position they are retained by friction.

The gears 28 and 29 are thus effectively guarded and they are also protected from dirt and accidental injury. Pressure on the'front top roll 20 is commonly provided by a curved link II, a lower Hair, and a separate weight 62, but this construction in itself forms no part of my invention.

From the preceding description, it will be seen that I have provided a combined gear guard and weighting device to be used with spinning apparatus of the long draft type, which device is of simple construction and economical to manufacture, while at the same time it is reliable and effective in operation.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:-

1. In a spinning frame having gear-connected upper and lower intermediate drawing rolls, a gear cover and guard comprising a main bearing member having a recessed portion to receive the driving gear of the upper roll and having a bearing portion engaging the shaft of said upper intermediate drawing roll, said member having also a pair of casing members pivoted thereto and supported thereby, said casing members depending from said bearing member and embracing and protecting the driving gears of both the upper and lower intermediate rolls, and said members being pivotally separable to permit upward removal of said cover and guard.

2. In a spinning frame having gear-connected upper and lower intermediate drawing rolls, a

member having a recessed portion to receive the driving gear of the upper roll and having spaced bearing portions at each side of said recess 'engaging the shaft of said upper intermediate roll at each side of said gear and supported thereby, said bearing member having also a pair of easing members pivoted thereto and depending therefrom, and said casing members embracing the driving gears of both the upper and lower intermediate rolls, and said members being pivotally separable to permit upward removal of said cover and guard.

3. In a spinning frame having gear-driven upper intermediate drawing rolls, a gear cover and guard comprising a main bearing member having a bearing portion engaging the shaft of said upper intermediate drawing roll, a pair of gear-embracing casing members pivoted thereto, supported thereby and depending therefrom, a weighting arm forming a part of said main bearing member and extending over an adjacent top roll, and means to suspend a weight on said arm.

4. In a spinning frame having gear-driven upper intermediate drawing rolls, a gear cover and guard comprising a main bearing member having a bearing portion engaging the shaft oi.

said upper intermediate drawing roll, a pair of gear-embracing casing members pivoted thereto, supported thereby and depending therefrom, a weighting arm forming a part of said main bearing member and extending laterally therefrom,

said arm having a bearing surface positioned to engage an adjacent top roll, a link mounted on said arm, and a weight on said link, said weight thereby applying pressure simultaneously to both of said adjacent rolls.

5. In a spinning frame having gear-driven upper intermediate drawing rolls, a gear cover and guard comprising a main bearing member having a bearing portion engaging the shaft of said upper intermediate drawing roll, a pair of gear-embracing casing members pivoted thereto, supported thereby and depending therefrom, a weighting arm forming a. part of said main bearing member and extending laterally therefrom, said arm having a bearing surface positioned to engage an adjacent top roll, a link mounted on said arm and held in a definite and predetermined position thereon, and a weight suspended fromsaid link and applying pressure simultaneously to both of said adjacent rolls,

JADIES L. TRUSLOW. 

